A 5.50 gram sample of a hydrate of sodium carbonate is heated, cooled, and massed. The resulting anhydrous solid has a mass of 2.15 g. What is the correct formula and name of the hydrated compound?

What is the nature of the ca-cl bond in a molecule of calcium chloride (cacl2) if the electronegativity value of calcium is 1.0 and that of chlorine is 3.16?

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next